Roberto Martinez hit out at Lee Mason's decisions to only give Jonathan Walters a yellow for pulling back Leighton Baines in the first half and then award a penalty to the visitors moments later, having adjudged James McCarthy to have fouled Bojan Krkic.

Walters had appeared to be the last man in the first incident, while the contact on Bojan, who converted the spot-kick himself, looked minimal in the second.

And asked if whether thought, given the Agbonlahor episode, that Mason should have been allowed to take charge of the Everton-Stoke game, Martinez said: "I don't know, that's not my call - I can only make a call on his performance today, and it was very disappointing.

"It was for everyone to see and maybe the PGMOL (Professional Game Match Officials Limited, the referees' body) need to make a decision about that."

Martinez also made reference after the Boxing Day loss to the Potters to another incident from earlier in the season where he felt Mason had failed to correctly punish a player in a last-man scenario.

Speaking about Everton's 1-1 draw at Sunderland in November and a foul from Connor Wickham on Seamus Coleman that resulted in a penalty but no card, the manager said: "It is a real bad sign to see the same referee making two mistakes applying the same rule - that is a worry.

"Against Sunderland, it is a penalty, he is the last man, and it should have been a red card.

"Today, if you give a free-kick, it is difficult to justify that that is not a goalscoring situation. So that is a real disappointment."

Martinez argued the Walters-Baines incident should have been "nothing or a red card".

And regarding the penalty decision involving his fellow Spaniard Bojan, Martinez said: "The penalty, I understand it - clearly I know that culture well, that Catalan culture.

"You have been brought up in a way so that you force the referee to make a decision.

"But I don't think there is enough contact for it to be a penalty.

"I can understand why he gave it, but when you look at the replay, both feet go off the ground with no contact and you can understand the striker looking for a decision.

"I can see why he gave it because the two bodies come together - the referee makes a decision.

"But then if he doesn't give the red card, because he is not sure, I don't understand why he gives the penalty - he cannot be sure it is a penalty. So the lack of consistency is what disappoints me."